I compete with two horses often and I couldn't do it with out a groomer or someone to help
Groomer is the Best tip which could help You
Emma has the best idea, but just to add...ask for tack holds prior to your classes so you have a couple minutes to switch horses
Yes i find you need at least one person to help out tacking both up and if they are okay being left alone (mine is not ) you can just go do ur class and then come back swap horses
You need to just say calm and don't stress because you have 2.
That probs never really helped but I tried